title: White light generation in Dy(3+)-doped oxyfluoride glass and transparent glass-ceramics containing CaF2 nanocrystals.
abstract: The radiative emission properties of the Dy3+ ions in an oxyfluoride glass and glass-ceramics have been studied for the generation of white light. The x-ray diffraction pattern of the glass-ceramics shows the formation of CaF2 fluorite-type nanocrystals in the glass matrix after a suitable thermal treatment of the precursor glass, whereas time-resolved optical measurements show the incorporation of the Dy3+ ions in the CaF2 nanocrystals. Intense white light has been observed when the samples are excited with 451 nm laser light. From the visible emission spectra, yellow to blue intensity ratios and the chromaticity color coordinates have been determined. All the color coordinates are found to lie in the white light region of the chromaticity color diagram.
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, South Korea.
authors.forename: P
authors.initials: P
authors.lastname: Babu
authors.forename: Kyoung Hyuk
authors.initials: KH
authors.lastname: Jang
authors.forename: Ch Srinivasa
authors.initials: ChS
authors.lastname: Rao
authors.forename: Liang
authors.initials: L
authors.lastname: Shi
authors.forename: C K
authors.initials: CK
authors.lastname: Jayasankar
authors.forename: Víctor
authors.initials: V
authors.lastname: Lavín
authors.forename: Hyo Jin
authors.initials: HJ
authors.lastname: Seo
mesh_terms: D002124:Calcium Fluoride / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005898:Glass / Q000737:chemistry; D008029:Lighting / Q000295:instrumentation*
chemical_list: D002124:Calcium Fluoride